Comparison of parathyroid hormone (1-34) and elcatonin in postmenopausal women with osteoporosis: an 18-month randomized, multicenter controlled trial in China

 

Background  Recombinant human parathyroid hormone (1-34) (rhPTH (1-34)) is the first agent in a unique class of anabolic therapies acting on the skeleton. The efficacy and safety of long-term administration of rhPTH (1-34) in Chinese postmenopausal women had not been evaluated. This study compared the clinical efficacy and safety of rhPTH (1-34) with elcatonin for treating postmenopausal women with osteoporosis in 11 urban areas of China.

Methods  A total of 453 postmenopausal women with osteoporosis were enrolled in an 18-month, multi-center, randomized, controlled study. They were randomized to receive either rhPTH (1-34) 20 µg (200 U) daily for 18 months, or elcatonin 20 U weekly for 12 months. Lumbar spine (L1–4) and femoral neck bone mineral density (BMD), fracture rate, back pain as well as biochemical markers of bone turnover were measured. Adverse events were recorded.

Results  rhPTH (1-34) increased lumbar BMD significantly more than did elcatonin after 6, 12, and 18 months of treatment (4.3% vs. 1.9%, 6.8% vs. 2.7%, 9.5% vs. 2.9%, P <0.01). There was only a small but significant increase of femoral neck BMD after 18 months (2.6%, P <0.01) in rhPTH groups. There were larger increases in bone turnover markers in the rhPTH (1-34) group than those in the elcatonin group after 6, 12, and 18 months (serum bone-specific alkaline phosphatase (BSAP) 93.7% vs. –3.6%; 117.8% vs. –4.1%; 49.2% vs. –5.8%, P <0.01; urinary C-telopeptide/creatinine (CTX/Cr) 250.0% vs. –29.5%; 330.0% vs. –41.4%, 273.0% vs. –10.6%, P <0.01). rhPTH (1-34) showed similar effect of pain relief as elcatonin. The incidence of clinical fractures was 5.36% (6/112) in elcatonin group and 3.2% (11/341) in rhPTH (1-34) group (P=0.303). Both treatments were well tolerated. Hypercaluria (9.4%) and hypercalcemia (7.0%) in rhPTH (1-34) group were transient and caused no clinical symptoms. Pruritus (8.2% vs. 2.7%, P=0.044) and redness of injection site (4.4% vs. 0, P=0.024) were more frequent in rhPTH (1-34). Nausea/vomiting (16.1% vs. 6.2%, P=0.001) and hot flushes (7.1% vs. 0.6%, P <0.001) were more common in elcatonin group.

Conclusions  rhPTH (1-34) was associated with greater increases in lumbar spine BMD and bone formation markers. It could increase femoral BMD after 18 months of treatment. rhPTH could improve back pain effectively. The results of the present study indicate that rhPTH (1-34) is an effective, safe agent in treating Chinese postmenopausal women with osteoporosis. (ChiCTR- TRC-10000924)

     

Association of the MTHFR C677T polymorphism and bone mineral density in postmenopausal women：a meta-analysis

Osteoporosis is a condition characterized by low bone mineral density （BMD） and micro-architectural changes in the bone tissue.The risk of osteoporosis is partly determined by genetic factors.The role of C677T polymorphism of methylenetetrahydrofolate reductase （MTHFR） gene has been investigated in postmenopausal osteoporosis.However,the relationship between MTHFR polymorphism and BMD is still controversial.We carried out a meta-analysis of 5,833 subjects to evaluate the association of MTHFR and BMD in postmenopausal women.Databases of MEDLINE,Web of Science,Scopus and CNKI were retrieved for all publications relating to MTHFR polymorphism and BMD in postmenopausal women.Five eligible studies were selected for meta-analysis.All these articles studied the association of MTHFR polymorphism and BMD of the femoral neck and lumbar spine in postmenopausal women.Our analysis suggested that postmenopausal women with the TT genotype had lower femoral neck BMD than the women with the CC/CT genotype,and the weighted mean difference （WMD） was-0.01 g/cm 2 [95% confidence interval （CI）：（-0.01,-0.01）,P 0.01].However,BMD of the lumbar spine of postmenopausal women with the TT genotype was not significantly different from that of women with the CC/CT genotype.In the random effects model,the WMD between the TT and TC/CC genotype was-0.01 g/cm 2 [95% CI：（-0.04,0.01）,P=0.32].The C677T polymorphism of the MTHFR gene is associated with BMD of the femoral neck in postmenopausal women.Women with the TT genotype of the MTHFR gene have lower BMD,suggesting that the TT genotype may be a risk factor for postmenopausal osteoporosis.     

Effects of vibration therapy on bone mineral density in postmenopausal women with osteoporosis

Background Jaw osteonecrosis possibly associated with the administration of bisphosphonates is expected to be treated with a non-pharmacologic approach. This study aimed to determine whether noninvasive, mechanically mediated vibration would inhibit the decline in bone mineral density （BMD） that follows menopause, enhance the BMD of the lumbar and femoral neck, and reduce chronic back pain in postmenopausal women with osteoporosis.
Methods A total of 116 postmenopausal women with osteoporosis participated in this study, and they were divided into groups A （66 patients） and B （50）. Group A received vibration treatment （Subjects vertically stand on the vibration platform, with a vibration frequency of 30 Hz, amplitude of 5 mm; they received the treatment five times per week, ten minutes each time and totally for six months）, whereas women of group B served as controls without any treatment. L2-4 BMD, bilateral femoral neck BMD, and body mass index （BMI） were recorded before the treatment or at the third and sixth months of the treatment respectively. After the ending of the treatment, the change of BMD in each group was compared and analyzed. Chronic back pain was evaluated by visual analogue scale （VAS） at baseline and the third and sixth months of the treatment.
Results Of the 116 women, 94 including 51 women from group A （（61.23±8.20） years） and 43 women from group B （（63.73±5.45） years）, completed the study. There were no significant differences in baseline characteristics including age, BMI, menopausal years, lumbar BMD, femoral neck BMD, and VAS between the two groups. The lumbar BMD of the 51 women in group A increased by 1.3% （P=0.034） after vibration treatment for 3 months and by 4.3% at the sixth month （P=0.000）. The lumbar BMD in group B was decreased at the third month, but there was not statistical significance （P〉0.05） At the sixth month, it was decreased by 1.9% （P 〈0.05）. The femoral neck BMD of the 51 women in group A was slightly in     

The clinical value of BALP on diagnosis and treatment of osteoporosis in postmenopausal women

Objective： To investigate the changes of bone-specific alkaline phosphatase （BALP） in postmenopausal women, analyze the relationship between BALP and bone mineral density, and study the effects of treatment with risedronate on BALP. Methods ： In this study, 243 women who were all at least 1 year past natural menopause were divided into two groups according to WHO standards. Group Ⅰ was 100 osteopenic patients aged from 43 to 85 （mean age, 61.2 years）. Group Ⅱ was 143 osteoporotic patients aged from 45 to 80（mean age, 62.6 yearsi. Bone mineral density（BMD） was measured by dual-energy X-ray absorptiometry （DEXA） and bone-specific alkaline phosphatase（BALP） was tested among all the patients. All the osteoporotic patients received 1-year Risedronate treatment. BALP was tested again after 3 months treatment of Risedronate for osteoporotic patients and BMD was measured after 1-year treatment. All data were processed by the application of statistical package SAS for windows V.6.12. Results： BALP was greater in the osteoporotic patients as compared with the osteopenic patients （P 〈 0.05）. There was also a significant difference of BALP in the patients before and after treatment of risedronate （P 〈 0.05）. BALP was greater in the patients who were less than 5 years past a natural menopause as compared with those who were more than 5 years past a natural menopause （P 〈 0.05）. There was no significant difference of BALP in the patients who were more than 10 years past a natural menopause. Risedronate decreased serum BALP significantly. Logistic regression analyses showed that 3-month percentage decrease in BALP was profoundly associated with the 1-year percentage increase in BMD（r = 0.696, P 〈 0.01 ）. Conclusion： BALP can predict the response in bone mass during Risedronate treatment in postmenopausal women and identify those noncompliant patients. 3-month percentage change in serum BALP was significantly correlated with the increase of BMD. Serum BALP can play a role in the monitoring of risedronate-treated postmenopausal women with osteoporosis, but it is poor to predict the treatment effects on an individual level.     

Effect of Depot Medroxyprogesterone Acetate （DMPA） on Bone Mineral Density in Women of Reproductive Age

Objective To compare bone mineral density （BMD） between users of intramuscular depot medroxyprogesterone acetate（DMPA ） and nonhormonal control subjects. Methods The study included 68 women aged between 25 and 40 years using depot medroxyprogesterone acetate for 24 months and 59 women aged between 25 and 40 years using nonhormonal contraception as control subjects. BMD of the lumbar spine and femoral neck were obtained using dual energy X-ray absorptiometry. Results At 24 months of treatment, as compared with baseline, the mean BMD in lumbar spine and femoral neck was decreased by 5.5% and 5.9%, respectively. Lumbar spine and femoral neck BMD in women who used DMPA were significantly decreased compared with the subjects in nonuser （P〈0.001）. Conclusion These results show BMD declined during using DMPA in women aged 25 -40 years old.     

Benefit period using alendronate to increase bone mineral density in women with osteoporosis?

Background Alendronate, a nitrogen-containing bisphosphonate is a specific inhibitor of bone resorption and now in the forefront of treatment of osteoporosis. In this study, we reported a significant increase in bone mineral density (BMD) of the spine and the hip in postmenopausal women taking alendronate at 10mg/d for 1,2 and 3 years. Methods Participants had received daily, oral, 10mg dose of alendronate for one to three years and placed into one of three groups according to alendronate treatment duration: 41 women received alendronate for 1 year (group Ⅰ) , 46 received alendronate for 2 years (group Ⅱ) , and 30 received alendronate tor 3 years (group Ⅲ). Measurements of bone density had been made by dual energy X-ray absorbtiometry once each year.Results The differences in L2-L4,L2, L4, femoral neck and trochanter BMD values before and after treatment for first group were significantly different. In second group, significant differences between initial and after treatment were found at the other sites except at the Ward‘s triangle. In the third group, only a significant increase in the L2-L4, L2, L3, L4, trochanter BMD values between before treatment and at the end of third year was found. Comparisons between groups were performed with Student‘s t test. ANOVA was used to test the age, menopause age, menopause duration and initial BMD values between the three groups. Calculated P values of less than 0.05 were considered statistically significant.Conclusions Alendronate had increased BMD significantly at the spine and hip in postmenopausal women over three years. Increases of BMD in third group were significant during the first and second years. However, continued therapy with alendronate had been required to maintain the gain in BMD over the third year.     

Association of farnesyl diphosphate synthase polymorphisms and response to alendronate treatment in Chinese postmenopausal women with osteoporosis

Background Genetic factors are important in the pathogenesis of osteoporosis,but less is known about the genetic determinants of osteoporosis treatment.We aimed to explore the association between the gene polymorphisms of key enzyme farnesyl diphosphate synthase （FDPS） in mevalonate signaling pathway of osteoclast and response to alendronate therapy in osteoporotic postmenopausal women in China.Methods The study group comprised 639 postmenopausal women aged （62.2＆#177;7.0） years with osteoporosis or osteopenia who had been randomly assigned to low dose group （70 mg/2w） or standard dose group （70 mg/w） of alendronate in this 1-year study.We identified allelic variant of the FDPS gene using the polymerase chain reaction and restriction enzyme Faul.Before and after treatment,serum levels of calcium,phosphate,alkaline phosphatase （ALP）,cross linked C-telopeptide of type Ⅰ collagen （β-CTX） were detected.Bone mineral density （BMD） at lumbar spine and proximal femur was measured.The association was analyzed between the polymorphisms of FDPS gene and the changes of BMD,bone turnover biomarkers after the treatment.Results The FDPS rs2297480 polymorphisms were associated with baseline BMD at femoral neck,and patients with CC genotype had significantly higher baseline femoral neck BMD （（733.6＆#177;84.1） mg/cm2） than those with AC genotypes （（703.0＆#177;86.9） mg/cm2） and AA genotypes （（649.8＆#177;62.4） mg/cm2） （P 〈0.01）.No significant difference in BMD at lumbar spine was observed among different genotypes of FDPS.The percentage change of serum ALP level was significantly lower in patients with CC genotype （-22.9%） than that in those with AC genotype （-24.1%） and AA genotype （-29.8%） of FDPS after 12 months of alendronate treatment （P 〈0.05）.Neither percentage change of BMD nor β-CTX level after alendronate treatment had association with FDPS genotype.Conclusions FDPS gene was probably a candidate gene to predict femoral neck BMD at baseline.FDPS gene alleles could predict change percentage of ALP after treatment of alendronate,but possibly had no significant relationship with the responsiveness of BMD to alendronate therapy.     

Clinical and angiographic characteristics of premenopausal women with coronary artery disease

Background Coronary artery disease （CAD） is generally considered as a disease of middle-aged men. It is widely accepted that the risk for CAD of premenopausal women is low because of hormone protection. Based on our clinical experience, more and more premenopausal women suffer from angina and myocardial infarction without adequate concern. Even now, there are still limited detailed data to describe the characteristics, mechanism and prognosis of premenopausal CAD patients. This article aimed to analyze the clinical and angiographic characteristics of premenopausal women with CAD.
Methods A total of 565 premenopausal women and 721 postmenopausal women （56-60 years old） who underwent coronary angiography for the first time from April 2004 to December 2007 were enrolled. The clinical data and coronary angiographic characteristics （presence, localization, length and severity） were compared between the premenopausal and postmenopausal CAD groups.
Results Premenopausal CAD patients presented less frequently with hypertension, diabetes mellitus and dyslipidemia compared with postmenopausal CAD patients （55.0% vs 66.0%, 15.0% vs 31.5%, 23.9% vs 37.4%, respectively; all P 〈0.05）. Although we found more frequent involvement of single vessel in premenopausal CAD （43.2% vs 26.9%, P=0）, and triple vessels in postmenopausal （56-60 years old） CAD patients （33.8% vs 20.4%, P=0）, much more severe lesions （z90%） at left main （2.9% vs 1.1%, P=0.048） and proximal left anterior descending artery （LAD） （28.2% vs 16.6%, P=0） in the premenopausal CAD group were found.
Conclusion Premenopausal women with chest discomfort are always found to have obvious atherosclerosis, more .inclined to be located at the left main and proximal LAD, which is a strong predictor of an adverse clinical outcome.     

Gender differences in efficacy of primary percutaneous coronary intervention in patients with ST-elevation myocardial infarction

Background The clinical outcome of percutaneous coronary intervention （PCI） is poorer in women than that in men. This study aimed at comparing the impact of gender difference on the strategy of primary PCI in patients with acute ST-segment elevation myocardial infarction （STEMI）.
Methods Two hundred and fifty-nine patients with STEMI who underwent primary PCI within 12 hours of symptom onset were enrolled. The male group consisted of 143 men aged 〉55 years, and a female group included 116 women without age limitation. Procedural success was defined as residual stenosis 〈20% with thrombolysis in myocardial infarction flow grade 〉2 and without death, emergency bypass surgery or disabling cerebral events during the hospitalization. The rate of major adverse cardiac events （MACE）, including death, nonfatal myocardial infarction and target vessel revascularization during follow-up, was recorded.
Results Female patients were more hypertensive and diabetic and with fewer cigarette smokers than male counterparts. The prevalence of angiographic 3-vessel disease was higher in the female group, but the procedural success rate was comparable between the two groups （94.4% vs 92.2%）. The occurrence rate of MACE did not differ during the hospitalization （4.2% vs 6.0%, P=0.50）, but was significantly higher in the female group during follow-up （mean （16.0±11.2） months） than that in the male group （5.4% vs 0.7%, P=0.02）.
Conclusion Despite a similar success rate of primary PCI and in-hospital outcomes in both genders, female patients with acute STEMI still have a worse prognosis during the long-term follow-up.     

Effect of Combined Oral Contraceptive Use on Bone Mineral Density in Adolescent Females

Objective To compare adolescents’bone mineral density (BMD) between users of combined oral contraceptive (Marvelon, desogestrel/ethinylestradiol) and nonhormonal control subjects. Methods The study included 127 women who aged between 16 and 18 years using Marvelon for 24 months and 115 women who aged between 16 and 18 years using nonhormonal contraception as control subjects. BMD of the lumbar spine and femoral neck were obtained using dual energy X-ray absorptiometry. Results After 24 months of Marvelon use, as compared with baseline, the mean BMD in lumbar spine and femoral neck were decreased by 0.30% and 0.61%, respectively. While in the nonusers group, the mean BMD were increased by 1.88% and 1.10%, respectively. Lumbar spine and femoral neck BMD in women who used Marvelon were not significantly different compared with the subjects who used nonhormonal contraception (P>0.05). Conclusion Two years of Marvelon use had no significant effect on BMD, but it remains unknown whether longer than 2 years of use has a significant adverse effect on the attainment of peak bone mass.     

重组人甲状旁腺素(1-34)与降钙素治疗绝经后骨质疏松临床观察

目的:观察对比重组人甲状旁腺素(1-34)[Recombinant human parat-hyroid hormone,rhPTH(1-34)],后简称PTHI和降钙素(calcitionin,CT)对绝经后妇女骨质疏松症的疗效.方法:符合入选标准的56例绝经后妇女骨质疏松患者随机分为两组:PTH组(n=30)皮下注射重组人甲状旁腺素20 μg每天1次;CT组(n=26)肌肉注射降钙素20 Iu每周1次,两组均每日给予钙尔奇D 600mg/d,连续治疗6个月.比较治疗前后腰椎(L_(2～4))骨密度及T值,血钙磷及碱性磷酸酶(Alkaline phosphatase,AKP)等指标的变化及观察有无不良反应.结果:治疗后PTH组和CT组腰椎(L_(2～4))骨密度(Bone mineral density,BMD)均有明显增加[PTH组:(-4.09±1.30 vs-3.70±1.17)SD;CT组:(-4.03±1.27 vs-3.74±1.19)SD,均P<0.01].但两组间比较无明显差异.PTH组治疗后AKP明显增高[(88.2±28.2vs 123.2±34.2)U/L,P<0.05],而CT组无明显变化.另外,CT组治疗后血清胆固醇(Total cholesterol,TC)降低[(5.64±0.61 vs 5.22±0.70)mmol/L,P<0.O1].两组均无严重不良反应发生.结论:rhPTH(1-34)与降钙素都能显著提高BMD和缓解骨质疏松症状,对于治疗骨质疏松安全有效.     

鳗鱼降钙素对绝经后骨质疏松症的疗效观察

目的 探讨鳗鱼降钙素治疗绝经后骨质疏松症的疗效.方法 将70例绝经后骨质疏松症患者随机分为两组,治疗组40例,应用鳗鱼降钙素治疗,20 IU肌注每周一次,疗程6个月;对照组30例.两组均口服钙尔奇D(含元素钙600 mg,维生素D125 IU)每天一片,疗程6个月.两组治疗前后均测定2～4腰椎、骨股颈及wards三角骨密度(bone mineral density,BMD),记录患者临床症状.结果 治疗组2个月后骨痛改善率高于对照组(P<0.01),治疗组患者腰2、腰3、腰椎均值BMD较前明显升高(P<0.05).对照组BMD治疗前后无明显变化(P>0.05).结论 鳗鱼降钙素与钙剂联合应用对治疗绝经后骨质疏松症有减轻疼痛,改善症状,同时增加骨密度作用.     

Efficacy and Safety of Risedronate Sodium in Treatment of Postmenopausal Osteoporosis

With the aging of the population,the inci-dence of pri mary osteoporosis is getting higher andhigher,among which post menopausal osteoporosis(PMOP)is the most commontype.As an effectivemedicine to inhibit bone absorption,bisphospho-nates has become the main medicationtotreat oste-oporosis.In this clinical trial,we investigated theefficacy of residronate sodium,the third-generationbisphosphonates made in China,in the treat mentof PMOP by exploring its effect on bone mineraldensity(BMD)and b…     

盐酸雷洛昔芬对绝经后骨质疏松妇女骨密度、骨代谢生化指标和血脂的影响

目的确定盐酸雷洛昔芬(raloxifene HCl, RLX)对中国绝经后骨质疏松妇女骨密度、骨代谢生化指标及血脂的影响.方法采用多中心、随机、双盲、安慰剂对照的临床研究,共入组204例绝经后骨质疏松妇女,随机分为(1)RLX组(102例)每日服用RLX 60 mg;(2)安慰剂组(102例)服用与RLX外观一样的安慰剂.两组对象均每日补充元素钙500 mg及维生素D 200 U,共治疗12个月.观察指标为腰椎、髋部骨密度;骨代谢生化指标[血清C端交联肽(CTX) 、骨钙素(BGP)];血脂.骨密度测定采用双能X线吸收法,骨代谢生化指标测定应用一步ELISA法,血脂测定应用酶法.结果研究结束时,腰椎骨密度RLX组平均增加3.3%±4.8%,安慰剂组增加1.0%±4.9%(P<0.001).髋部骨密度RLX组平均增加了1.4%±4.8%,安慰剂组平均降低了0.9%±5.0%,(P<0.001).在RLX组,无一例发生新的椎体骨折,而安慰剂组有5例发生新骨折(P=0.059).在RLX组,BGP及 CTX分别降低41.7%和61.5%,而安慰剂组则分别降低10.6%和35.6%,两组比较P均<0.001.RLX组血总胆固醇(TG)和低密度脂蛋白胆固醇(LDL-C)明显低于安慰剂组(均P<0.001).而两组的高密度脂蛋白胆固醇(HDL-C)和甘油三酯(TG)水平比较差异则无显著意义. 结论雷洛昔芬能够显著增加中国绝经后骨质疏松妇女腰椎和髋部的骨密度,显著降低骨转换率及总胆固醇和低密度脂蛋白胆固醇.     

Effects of raloxifene hydrochloride on bone mineral density, bone metabolism and serum lipids in Chinese postmenopausal women with osteoporosis: a multi-center, randomized, placebo-controlled clinical trial

Thereducedproductionofestrogenfollowingmenopauseleadstoacceleratedbonelossinpostmenopausalwomen Inseverecases ,thismayleadtoosteoporosisincreasingriskoffractures Whileestrogenreplacementtherapy (ERT)andhormonereplacementtherapy (HRT )canpreventpostmenopausalboneloss ,1,2 estrogenusemayproduceundesirablesideeffectssuchasvaginalbleedingandbreasttenderness Long termestrogenuse (withoutconcurrentuseofprogestin)hasbeenreportedtocauseanincreasedriskofendometrialcancer 3　Inaddition ,ithasbeenrepo…     

阿仑膦酸钠防治绝经后骨质疏松的疗效

目的观察国产阿仑膦酸钠防治绝经后骨质疏松症的疗效。方法56例50～74岁骨量减少或骨质疏松的绝经后妇女随机分为两组(每组28人),每日给予阿仑膦酸钠10mg/d或安慰剂,两组均加服碳酸钙片和维生素D,治疗6个月。试验前后用双能X线吸收法检测腰椎和髋部的骨矿密度(bonemineraldensity,BMD),同时检测骨转换的生化指标。结果与治疗前相比,治疗组腰椎BMD平均增加5%(P<0.01),对照组各部位的BMD均下降(P<0.05);治疗组骨吸收指标和骨形成指标均降低,其中NTx下降最明显,近75.7%(P<0.001),而对照组却无显著性变化。结论国产阿仑膦酸钠能降低绝经后妇女的骨转换,增加骨量。     

原发性骨质疏松症患者重组人甲状旁腺素治疗前后性激素结合球蛋白水平分析

目的：观察原发性骨质疏松症患者重组人甲状旁腺素[rhPTH（1-34）]治疗前后血清性激素结合球蛋白（SHBG）水平的变化,并分析其与rhPTH（1-34）治疗骨质疏松症效果的相关性。方法收集老年原发性骨质疏松症患者20例及健康体检者30例,原发性骨质疏松症患者进行rhPTH（1-34）治疗。分别于治疗前及治疗1年后检测血清SHBG水平、生化指标、性激素水平及腰椎（L2－4）骨密度（BMD）,并对各项检测指标进行相关性分析。结果经rhPTH（1-34）治疗后,腰椎（L2－4）BMD值、T值较治疗前明显增加（P＜0.05或0.01）,血磷、碱性磷酸酶（ALP）及雌二醇（E2）水平明显增高（P＜0.05或0.01）;血钙、促卵泡生成素（FSH）、睾酮（TT）、促黄体生成素（LH）、甘油三酯（TG）和胆固醇（TC）等指标治疗前后均无显著变化（均P＞0.05）。原发性骨质疏松症患者SHBG水平与正常对照组比较明显增高（P＜0.05）,经rhPTH（1-34）治疗1年后SHBG水平明显降低（P＜0.05）。SHBG与BMD值、T值、E2水平变化呈明显负相关（r=-0.78、-0.67、-0.53,均P＜0.01）。结论原发性骨质疏松症患者经rhPTH（1-34）治疗后,血清SHBG水平显著下降,推测SHBG参与原发性骨质疏松症的形成过程,并在rhPTH（1-34）治疗中发挥重要作用。     

Estrogen receptor gene polymorphisms and bone mineral density in Chinese postmenopausal women

Objective To investigate the relationships between the polymorphisms of estrogen receptor (ER) gene, bone mineral density (BMD) and bone biochemical markers in Chinese postmenopausal women. Methods BMD of lumbar spine and femoral neck were measured using dual-energy X-ray absorptiometry （DEXA）in 186 Chinese postmenopausal women. The PvuⅡ and XbaⅠ polymorphisms of the ER gene were detected using polymerase chain reaction (PCR). Bone biochemical markers, serum alkaline phosphatase, osteocalcin and pyridinoline were measured by ELISA. Results The femoral neck(FN) BMD (Z score) was higher in pp compared to Pp (-0.01±0.12 vs. -0.35±0.09, P&lt;0.05) while lumbar spine BMD (Z score) was higher in XX type compared to Xx and xx genotypes (0.01±0.45 vs -1.53±0.17, -1.29±0.10, P&lt;0.001 and 0.001, respectively). Women without Px haplotype (n=79) had a higher BMD Z-score for the lumbar spine (-1.03±0.14 vs -1.45±0.11, P&lt;0.05) and femoral neck (-0.01±0.11 vs -0.31±0.09, P&lt;0.05) than those who had it (n=107). Conclusions The present study suggested that the pp and XX genotypes of ER gene might play a certain role in maintaining FN and lumbar spine BMD. ER genotypes without Px haplotype might be favorable to bone mass, while those with it might exert some harmful effect on bone mineral density.     

阿伦膦酸钠对绝经后骨量减少和骨质疏松妇女骨密度变化的影响

目的　观察绝经后骨量减少和骨质疏松妇女在阿伦膦酸钠 (福善美 )治疗和停药后的骨密度变化。方法　 4 0例绝经后骨质疏松和骨量减少的妇女 ,每日口服福善美 10mg和元素钙 5 0 0mg,分为服药 6个月组 2 5例 ,服药 12个月组 15例。停药后仅应用元素钙 5 0 0mg/d。观察服药期间和停药后的骨密度变化。结果　服药 6个月组 :腰椎 2～ 4和髋部的BMD值于服药 6个月时较服药前均有明显升高 ,其中腰椎 2～ 4升高 5 3% (P <0 0 0 1)。停药 13± 4个月后 ,腰椎 2～ 4和髋部的BMD值与服药 6个月时比较未见降低 ,大转子部位的BMD值较服药 6个月还有进一步升高。服药 12个月组 ,服药 6个月时 ,除Wards三角外 ,其他 3个部位的BMD值较用药前明显升高 ,其中腰椎 2～ 4升高4 2 % (P <0 0 0 1) ;服药 12个月时 ,腰椎 2～ 4的BMD较服药前升高 6 1% (P <0 0 0 1) ,而髋部的BMD较服药前未见明显改变。停药 2 3± 7个月后 ,腰椎和髋部的BMD与服药 12个月时相比均无明显变化。结论　阿伦膦酸钠治疗绝经后骨量减少和骨质疏松妇女 ,可以明显升高腰椎及髋部的骨密度 ,以腰椎部位升高更显著 ,停药后骨密度可维持 13～ 2 3个月。